Piston ring or assembly



Aug. 28, 1928.

S 1,682,477 C. P. BROCKWAY PISTON RING 0R ASSEMBLY Filed July 27. 31922 Patented Aug. ,28, 1928.

um'reo STATES em BRQCKWLY, or compo, :10;, ASSfiGNOIt TO museum. essence merenames, carotene,- onro, A communes or DELAWARE 5 r sronnme on seamstrnypuemoa mar any 27, 1922. serial 1'6. 577,;42.

i The present invention relates to means'incorporatedin a piston ringor in the-piston ringassembly, to prevent binding or inter? ference is use, caused by an accumulationof carbonu'poncontraction of the parts when used in an internal combustion engine and a subsequent expansion in order to facilitate the proper functioning and expansion 'into position in use toprcvent on the one hand an escape of gaspaist thepiston upon compression or on the other hand thepassage of oil between the piston and cylinder. I

An object of the inventionis therefore.

to provide a means. which will prevent an improper'accurnulation of Carbon either between a piston ring-and the groove in a piston or-betwe'en the expanding and con tracting'ends of a piston ring which inter femawith a .frea proper and accurate functioning of :the piston upon continued use, thereby greatlyl facilitating theaction of an internal combustion engine asa whole,

. and-renderingunnecessary frequent inspectionand cleaning and. breaking jofpiston rings in a pistonring assemblyra A further object ofthe present invention is to provide a means which may act in a is to provide a means Lane manner, to tend to: dislodge 7 an accumulation of carbon. by reason ofcthe inherent construe tion of. the piston ringer coaction between a piston ring and thepiston or other part upon which a ring may be mounted, the invention having utilityin use with junk rings such as are used "in Knight type en ea or otherqenginesand the construction s not limited to its application tothe piston ring itself. (a A further object of.- the; p'xrcsentinvention plane, a sliding surface or wedgingaction, in a construction of the character indicated to facilitate, or to permit further, relative movement of the parts in action where a ring of the character indicated is employed.

Various other objects are within the scope of this inventionsuch as relate to the arstructure, and to variousdetails of construction and to economiesof manufacture and numerous other features as will be apparent from consideration of the drawing and related description of a. form of the invention,

which maybe preferred, in which I Fig. '1 is an elevation, partly in section,

as an inclined I of one embodimentof the present invention shown applied to a piston. I

F ig.2 is a perspective view of one the piston rings shown in Fig. 1'. v

Fig; 3 is a sectional View through a piston showing the invention applied to the ringper se, the ring'being shown in plan view, while;

Fig. 4 is a perspective viewof the meeting;

a es ofthe ringillustrated in Fig. 3. In Fig. 1 I have shown aupiston 10 'provided with a piston ring groove 11, the upper transverse edge of which'v is bevelled. as in--v i to cooperate with the bevelled surfacet12 of the piston ring grooved Each of the piston. rings 13, inay be of any typeand saidrings are shown as split rings with "the meeting edges ofise as shown at 18,]197and' 200i Fig. 1.

f From an inspectiongo'fothefstructure dis closed it will bese'en that if carbon or any other rforeign substance accumulates asoccurs in theuse of van internal combustion engine,.the bevelled surfaces 16 and12 co, operate to produce the advantageous, functions hereinbeforeindicated. If the meeting surfaces were square, one 'faceto' face with the other, upon'a relative expansion of the two parts in different amounts, it wouldbe (liflicultif not impossible for the ringilfi, to expand as thesame would bind vertically be tween the ring andthe groove... Byfp-roviding the inclined sliding surfaces itl-will be f seen that upon a different expansion-ofthe piston and ring, the ring may readily slide on the inclined surface, notwithstanding an accumulation of carbon particles between the I surfaces 12 and 16. Moreover the construction operates to tend to be self-cleaning or tends to dislodge the carbon particles which formas the sliding action between the surface 16 and the bevelled surface 12 u'pon'contraction or expansion will accomplish this function as will be readilyunderstood. Referringto the construction illustrated in Figs. 3 and 4, it will be seen that I have provided the meeting ed es of a split piston ring 25;.with a bevel ed portion 26 for a portion of the height thereof, adapted to 

